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Analog Devices Inc./Maxim Integrated MAX1241ACPA
- Part No.:
- MAX1241ACPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1241ACPA.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
MAX1241ACPA from Maxim Integrated is a low-power, 12-bit successive-approximation ADC with 73ksps throughput, 7.5µs conversion time, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It operates from a single +2.7V to +5.25V supply, requires an external reference (0V to VREF input range), and targets space-constrained, battery-powered data acquisition systems.
For engineers reviewing the MAX1241ACPA datasheet, MAX1241ACPA pinout, MAX1241ACPA application, or MAX1241ACPA equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal and dynamic performance (SINAD = 70dB, THD = –80dB), and real-world alternative part guidance - all specific to the MAX1241ACPA 8-pin PDIP package at 0°C to +70°C.
Technical Context
The MAX1241ACPA implements a track/hold circuit with 1.5µs acquisition time and a 12-bit SAR core clocked by an internal oscillator. Its analog input accepts 0V to VREF signals, where VREF is externally supplied and must be stable within ±30ppm/°C (typical) over temperature.
Digital control uses three dedicated pins: CS (active-low chip select initiating conversion on falling edge), SCLK (up to 2.1MHz serial clock), and DOUT (3-state serial output synchronized to SCLK's falling edge). Shutdown is managed via the SHDN pin, reducing supply current to ≤2µA (max) in power-down mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit unipolar output with no missing codes over full temperature range |
| Throughput Rate | 73ksps maximum sampling rate, enabling real-time monitoring of fast transients |
| Conversion Time | 7.5µs fixed duration, independent of input signal slew rate |
| INL (Integral Nonlinearity) | ±0.5 LSB max, ensuring <0.012% full-scale error for precision sensor interfacing |
| SINAD | 70 dB at 10kHz input, supporting accurate digitization of medium-bandwidth analog signals |
| Supply Voltage Range | +2.7V to +5.25V - compatible with both 3.3V and 5V microcontroller I/O domains |
| Power Consumption | 1.9mA typical at 3.6V/73ksps; drops to ≤2µA in shutdown - critical for intermittent-sampling systems |
Pinout & Package
MAX1241ACPA is housed in an 8-pin plastic DIP (PDIP) package with through-hole mounting and 0.3-inch body width. Pin spacing is 0.1 inch, compatible with standard prototyping and production PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +5.25V; powers analog and digital sections - bypass with 0.1µF + 4.7µF capacitors |
| AIN (Pin 2) | Analog input | Single-ended input referenced to GND; accepts 0V to VREF range with 16pF input capacitance |
| SHDN (Pin 3) | Three-level shutdown control | Pull low for ≤2µA shutdown; high or open enables operation - no internal pull-up |
| REF (Pin 4) | Reference voltage input | External reference connection point; supports 1.0V to VDD range with ≤10Ω source impedance requirement |
| GND (Pin 5) | Analog/digital common ground | Single-point star ground connection required to minimize noise coupling between sections |
| SCLK (Pin 6) | Serial clock input | Asynchronous external clock up to 2.1MHz; minimum pulse width 200ns per edge |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion; high state places DOUT in high-impedance mode |
| DOUT (Pin 8) | Serial data output | 3-state output driven on SCLK falling edge; MSB-first format with leading EOC bit |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI, QSPI, and MICROWIRE protocols - eliminates need for additional level shifters or glue logic |
| Internal track/hold | 1.5µs acquisition time with no external hold capacitor - simplifies front-end design and reduces board area |
| Wide supply range | +2.7V to +5.25V operation enables direct integration into mixed-voltage systems without regulators |
| Low-power shutdown | ≤2µA max supply current in shutdown - extends battery life in portable logging and remote sensor nodes |
| Robust analog input | Input protected to –0.3V to VDD+0.3V with clamping diodes - tolerates transient overvoltage without damage |
Applications
| Battery-Powered Data Loggers | Isolated Industrial Sensor Interfaces |
|---|---|
Use Scenario: Continuous voltage/current measurement from thermocouples or RTDs in field-deployed environmental monitors powered by AA batteries. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor outputs at 1–10ksps, synchronized to µC-controlled sleep/wake cycles. Use Value: 2µA shutdown current and 73ksps burst capability enable >1-year battery life with periodic high-fidelity sampling. |
Use Scenario: Analog signal digitization in DIN-rail mounted PLC I/O modules with galvanic isolation between field side and controller side. IC Role / Device Role / Timing Role: Isolated-side ADC converting 4–20mA loop signals or ±10V sensor outputs before opto-coupled serial transmission. Use Value: Single-supply +2.7V to +5.25V operation allows direct use of isolated DC-DC output rails; 70dB SINAD ensures resolution retention across isolation barrier. |
| Portable Medical Instrumentation | Process Control Loop Monitoring |
Use Scenario: ECG front-end signal conditioning in handheld diagnostic devices requiring low-noise, low-power analog capture. IC Role / Device Role / Timing Role: High-accuracy ADC sampling amplified biopotential signals at 1–5ksps with minimal self-heating. Use Value: ±0.5 LSB INL and 1.5µs track/hold acquisition preserve waveform fidelity during rapid lead switching or motion artifacts. |
Use Scenario: Real-time monitoring of pressure, flow, and temperature transmitters in chemical plant control cabinets. IC Role / Device Role / Timing Role: Local ADC feeding HART or Modbus RTU communication stacks in smart transmitter designs. Use Value: SPI-compatible interface enables direct connection to industrial MCU UART/SPI peripherals; 73ksps throughput supports oversampling for noise reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply, 12-bit, 200ksps, SPI interface; no internal track/hold - requires external sample capacitor | Higher speed but increased external component count and layout sensitivity | Select when >100ksps sampling is required and board space permits external T/H support components |
| AD7476AARMZ | 2.35V–5.25V supply, 12-bit, 1MSPS, SPI interface; internal reference available (2.5V); 6-pin SOT-23 package | Smaller footprint and integrated reference, but higher quiescent current (1.5mA vs. 1.9mA at 3.6V) | Select for ultra-compact designs where reference flexibility is secondary to size and internal reference simplifies BOM |
Compared with ADS7822U and AD7476AARMZ, the MAX1241ACPA provides optimal balance of low power (1.9mA active, ≤2µA shutdown), guaranteed 1.5µs acquisition without external components, and proven robustness in battery-operated industrial environments - making it preferred for long-life, space-constrained DAQ nodes.
Availability
MAX1241ACPA is available at Aetrix Electronics and suitable for battery-powered systems, portable data logging, isolated data acquisition, and process control applications requiring stable component supply across extended product lifecycles.
Supply support for MAX1241ACPA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX1240/MAX1241 family delivers low-power, high-accuracy 12-bit ADCs optimized for remote sensing and portable instrumentation where supply headroom, board space, and energy efficiency are critical constraints.
FAQ
What is the maximum sampling rate of the MAX1241ACPA?
The MAX1241ACPA achieves a maximum throughput rate of 73ksps under specified conditions (VDD = +2.7V to +5.25V, fSCLK = 2.1MHz, TA = 0°C to +70°C). This rate is sustained across its full operating temperature range and supply voltage window, with conversion time fixed at 7.5µs - enabling deterministic timing for real-time control loops and synchronized data capture in the MAX1241ACPA.
Does the MAX1241ACPA include an internal voltage reference?
No, the MAX1241ACPA requires an external reference voltage applied to the REF pin. Unlike the MAX1240 variant, the MAX1241ACPA does not integrate an internal 2.5V reference. The device accepts external references from 1.0V to VDD, with specified accuracy requiring ≤10Ω source impedance and stability within ±30ppm/°C - a key functional distinction confirmed in the MAX1241ACPA datasheet.
What package type is used for the MAX1241ACPA?
The MAX1241ACPA is packaged in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and 0.1-inch pin pitch. This through-hole package is designated in the ordering code "PA" and is rated for operation from 0°C to +70°C - matching the "A" grade temperature specification explicitly assigned to the MAX1241ACPA part number.
How does the SHDN pin function on the MAX1241ACPA?
The SHDN pin on the MAX1241ACPA is a three-level control: pulling it low enables shutdown mode (≤2µA supply current), while leaving it open or driving it high activates normal operation. Unlike some ADCs, the MAX1241ACPA has no internal pull-up on SHDN - external biasing is required only if open-circuit behavior must be guaranteed. This precise control mechanism is documented for the MAX1241ACPA in the Pin Description section.
Which serial interface standards does the MAX1241ACPA support?
The MAX1241ACPA supports SPI, QSPI, and MICROWIRE protocols via its 3-wire interface (SCLK, CS, DOUT). It operates with CPOL = 0 and CPHA = 0, outputs data on SCLK's falling edge, and delivers MSB-first format with a leading end-of-conversion (EOC) bit - all confirmed in the Functional Diagram and Timing Characteristics sections for the MAX1241ACPA.
MAX1241ACPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 73k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1241ACPA FAQ
1.How can I place an order for MAX1241ACPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1241ACPA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1241ACPA reliable?
The price and inventory of MAX1241ACPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1241ACPA is usually 5 days.
3.What payment methods are accepted for MAX1241ACPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1241ACPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1241ACPA?
MAX1241ACPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1241ACPA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1241ACPA?
For technical support, including MAX1241ACPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1241ACPA requirements.
6.How does Aetrix verify that MAX1241ACPA is sourced from the original manufacturer or authorized distributors?
All MAX1241ACPA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1241ACPA meets industry standards.
7.What is the process for return or replacement of MAX1241ACPA?
All MAX1241ACPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1241ACPA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1241ACPA part is unused and in its original packaging.
Return procedure for MAX1241ACPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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